Rattle Snake is one of the few (if any) Nigerian movies that moved me to tears. Despite the fact it was released in '94, you can never get enough of it.
The first part was enough proof that a good movie doesn't necessarily have to comprise of blood, gore, unnecessary nudity and profanity.
I'd say there was some violence on subsequent episodes but they were not mindless. I honestly can't remember a Nigerian movie as good as RS, maybe somebody will have to refresh my memory.